Nanostructured polyelectrolytes for ion-selective membranes

Small, Leo J.; Percival, Stephen J.; Spoerke, Erik David

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DOE OSTI · 1735220

Nanostructured polyelectrolytes for ion-selective membranes

Small, Leo J.·Percival, Stephen J.·Spoerke, Erik David

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Abstract

Nanostructured polyelectrolyte bilayers deposited by Layer-by-Layer deposition on nanoporous membranes can be selectively crosslinked to modify the polyelectrolyte charge density and control ionic selectivity independent of ionic conductivity. For example, the polyelectrolyte bilayer can comprise a cationic polymer layer, such as poly(ethyleneimine), and an anionic polymer layer, such as poly(acrylic acid). Increasing the number of bilayers increases the cation selectivity when the poly(ethyleneimine) layer is crosslinked with glutaraldehyde. Crosslinking the membranes also increases the chemical and mechanical strength of the polyelectrolyte films. This controllable and inexpensive method can be used to create ion-selective and mechanically robust membranes on porous supports for a wide range of applications.

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25 ENERGY STORAGE 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY 77 NANOSCIENCE AND NANOTECHNOLOGY

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Small, Leo J., Percival, Stephen J., Spoerke, Erik David. 2020-09-08. Nanostructured polyelectrolytes for ion-selective membranes. https://www.osti.gov/biblio/1735220

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